Technical Approval Swivel Joist Expansion Joints - Maurer Söhne ...

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VERFASSER : BAUWERK : STRASSEN- UND WEGBRÜCKEN DATUM: 01.12.2007 After our personnel have finished the assembly, it must be checked and accepted by the Construction Supervisor and the completed installation of the construction has to be certified. Use the appropriate form referring to the construction. Shuttering and concreting is carried out by the construction company. The recesses must be shuttered in such a way that the scheduled dimensions are obtained at the edge beam and the joist boxes. Attention must be paid to careful and close shuttering to avoid concrete tearing into the joist boxes and the joint gap between superstructure and abutment. A sealing drainage (acc. to drawing Was 11) must be assigned for the prevention of banking behind the edge beams. The recesses must be cleaned carefully before concreting. Levels and axial position as well as the correct width of the expansion joint must be checked once again. It is obligatory to stick to the minimum measures of the concrete and the dimensions and position of reinforcements according to the constructional plan on page 4 after part 7. Concreting the superstructure section requires the client’s approval. The lean-mixed concrete must be low shrink and of an even or higher strength then the structural concrete, at least quality C30/37. During concreting special attention must be paid to the compression of the concrete at the anchor plates, under the base plates of joist boxes and under the horizontal flange of the edge beams so that a solid bearing of the steel elements to the concrete is guaranteed and a sufficient composite action is obtained. The steel and sealing elements must be protected during concreting or be cleaned with water immediately after the concreting procedure, so that there is no setting of concrete anywhere on the expansion joint. After the setting of concrete the transit clamps, fastened on the superstructure, must be removed. Lastly, the shuttering within the joint gap has to be removed and the joint has to be cleaned. 5.3 Anchoring in the cap area The anchoring of the cross section in the cap area is not allowed. A bitumastic filler has to be provided between the edge profile of the cross section and the cap area in the marginal and median strip range. The joint shows a wedge-shaped design to avoid cavitations. The bitumastic filler only allows movements of a few millimetres between the cap area and the structural concrete. Constructional design should ensure that larger movements remain impossible. While concreting the parapets, due to inevitable construction tolerances the end position of the possibly existent cover plates is to be considered. Shuttering aids can facilitate the accurate installation. BAUTEIL : SCHWENKTRAVERSEN-DEHNFUGE DS160 BIS 1200 BLOCK : 5 - EINBAUANWEISUNG SEITE: 26 VORGANG : REGELPRÜFUNG NACH TL/TP FÜ (STAND: 03/05) ARCHIV NR. Regelprüfung Nr. 05/07 vom 20.12.07 Diese Unterlagen sind Eigentum der MAURER SÖHNE GmbH & Co. KG. Jede Art der Vervielfältigung - auch auszugsweise - bedarf der Zustimmung. Formate und Inhalte sind urheberrechtlich geschützt!
VERFASSER : BAUWERK : STRASSEN- UND WEGBRÜCKEN DATUM: 01.12.2007 5.4 Procedure for bridges with steel carriageways The working processes are analogue to fastening to concrete components (See chapter 5.2). Basically there are three different methods: a) Support on a continuous beam, mounted before the end cross girder. b) Support on individual consoles with connection to the end cross girder c) Direct connection of the supporting sides of the joist box to the end cross girder The kind of construction strongly depends on structure and shall be planned, verified and proofed individually in detail. The technical approval covers no steel connections Start with the attachment of the cross section to the steel superstructure when installing. 5.5 Control of the installalation dimension The bridge design engineer determines the temperature-dependent gap and installation dimensions. If there are no special arrangements, the expansion joints are adjusted in the workshop for a provisional structure temperature of +10 °C. The presetting already done in the factory and the relevant expected installation temperature must be registered on the approved drawings The dimensions for the temperature-dependent presettings can be obtained from the Tables on the final drawings. Picture 2: Example table for temperature dependent pre-adjustment Directly before inserting the construction into the recesses, the presetting must be checked by the construction supervision and, if required, readjusted by our fitters. If a correction of the presetting becomes necessary, this has to take place in the expected direction of movement. A higher structural temperature requires a closing, a lower structural temperature an opening of the construction. For that purpose the screws of the movable installation holders (see picture 3) have to be unscrewed and then again tightened firmly after adjustment. BAUTEIL : SCHWENKTRAVERSEN-DEHNFUGE DS160 BIS 1200 BLOCK : 5 - EINBAUANWEISUNG SEITE: 27 VORGANG : REGELPRÜFUNG NACH TL/TP FÜ (STAND: 03/05) ARCHIV NR. Regelprüfung Nr. 05/07 vom 20.12.07 Diese Unterlagen sind Eigentum der MAURER SÖHNE GmbH & Co. KG. Jede Art der Vervielfältigung - auch auszugsweise - bedarf der Zustimmung. Formate und Inhalte sind urheberrechtlich geschützt!
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